Very impressed with this lens. Images are razor sharp above f/2.8 and quite acceptable even wide open at f/1.4, though there is some minor vignetting at this aperture.
The build quality compared to the Nikon equivalent is like comparing a Big Mac to a Fillet Steak.
The best Â£380 I ever spent on a lens.
PS. It really needs a good quality UV filter permanently fitted to tame lens flare and protect that huge 77mm piece of glass at the front of this lens.
PPS. Every photographer should have a good quality 50mm bright prime lens, & this is excellent quality for the money.